The HTTP 404 Not Found Error means that the webpage you were trying to reach could not be found on the server. It is a Client-side Error which means that either the page has been removed or moved and the URL was not changed accordingly, or that you typed in the URL incorrectly.
404 error means an error message displayed by a browser indicating that an Internet address cannot be found. It will be better to your site if you avoid 404 issue.
Why 404 error is counted as broken link and is there something called 501 error and how will impact SEO ??
